四、根据短文内容，在文中空白处填入 1 个适当的单词，或用括号内所给单词的正确形式填空。
Dr Ma tells us something about eye problems. Over one billion people have different kinds of eye problems, and about 90% of these cases can
1 be prevented
(prevent) or cured. However, many people don't have money for
2 medical
(medicine) treatment.
Orbis is
3 a
charity that helps them. It
4 uses
(use) its Flying Eye Hospital to help patients in poor areas. On the plane, volunteer doctors do operations. Many patients can't
5 afford
(afford) to go to hospital, so the plane goes to them. The plane is also used
6 as
a training centre. Local doctors and nurses are invited on board to learn about eye operations. Orbis can teach them new skills. By training them, the charity hopes to help more people. Last year, over 50,000 eye care training sessions were completed.
During Dr Ma's last visit, 150 patients
7 were operated
(operate) on. He is proud
8 to help
(help) people see again and improve their lives. Modern medicine
9 is developing
(develop) quickly, and lots of eye problems and diseases can be treated and cured.
10
But
the charity needs money to carry on with their work. They hope many people can support them.
1.
be prevented
2.
medical
3.
a
4.
uses
5.
afford
6.
as
7.
were operated
8.
to help
9.
is developing
10.
But
解析：
【分析】
这是一篇语篇型语法填空题，解题时首先要通读全文，理清文章围绕奥比斯眼科慈善机构展开的核心大意，再逐个分析空格：
1. 遇到括号内给动词的情况，首先判断主语和动词的主被动关系，再结合句中的时态、情态动词等限定条件确定正确形式；
2. 遇到括号内给名词的情况，观察空格后修饰的中心词，判断是否需要转换为形容词等形式作定语；
3. 没有给提示词的空格，优先考虑冠词、介词、连词等虚词，结合固定搭配和上下文逻辑推导答案。
顺着这个思路逐个验证每个空格的考点，就能顺利得出所有答案。
【解析】
1. 空格前主语these cases和动词prevent是被动关系，意为“病例被预防”，空格前有情态动词can，情态动词后接动词原形，因此填be prevented。
2. 空格后是名词treatment，需要用形容词修饰名词，medicine的形容词形式是medical，medical treatment意为“医学治疗”，因此填medical。
3. 此处泛指“一家慈善机构”，charity是发音以辅音音素开头的可数名词单数，因此填不定冠词a。
4. 全文主体时态为一般现在时，主语It是第三人称单数，谓语动词要变为第三人称单数形式，因此填uses。
5. 空格前有情态动词can't，情态动词后必须接动词原形，因此直接填afford。
6. 此处是固定搭配be used as，意为“被用作……”，句意为“这架飞机也被用作培训中心”，因此填as。
7. 时间状语是Last year表示过去，主语150 patients和动词operate是被动关系，意为“病人被做手术”，因此用一般过去时的被动语态，主语是复数，填were operated。
8. 此处是固定搭配be proud to do sth.，意为“很自豪做某事”，因此填不定式to help。
9. 句意为“现代医学正快速发展”，描述现阶段正在进行的动作，用现在进行时，主语Modern medicine是单数，因此填is developing。
10. 前文提到很多眼部问题可以被治疗治愈，后文说这家慈善机构需要资金来推进工作，前后是转折关系，句首首字母大写，因此填But。
【答案】
1. be prevented 2. medical 3. a 4. uses 5. afford
6. as 7. were operated 8. to help 9. is developing
10. But
【知识点】
动词时态语态 词形转换 固定短语搭配
【点评】
本题属于初中英语典型的语篇语法填空题型，考点覆盖全面，既考察了被动语态、非谓语动词、时态等核心语法点，也涉及词形变形、冠词介词连词的基础用法，同时需要学生结合上下文逻辑判断转折关系，难度适中，适合巩固基础语法知识，培养语篇语境下的语法运用能力。
【难度系数】
0.7
